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1、外文资料翻译Oxidationditches1.IntroductionOxidationditchandcontinuouscircularaerationtank,deformationisoneoftheactivatedsludgeprocess.OxidationditchsewagetreatmenttechnologyissuccessfullydevelopedbytheDutchinthe1950sandhealthengineering.PutintouseintheNetherlandsforthefirsttimesince1954.D
2、uetoitsgoodeffluentwaterquality,steadyoperation,convenientmanagementandothertechnicalcharacteristics,hasbeenwidelyusedbothathomeandabroadindomesticsewageandindustrialwastewatertreatment.Thetypesoftheoxidationditchhasbeenwidelyappliedatpresentinclude:pass,oxidationditch,theCarrouselo
3、xidationditch,Mr.Belloxidationditch,Toxidationditch,threegroovetypeoxidationditch,andtheintegrationofDEtypeoxidationditchandoxidationditch.Theoxidationditchbecauseofthedifferencesonthestructureandoperation,soeachhasitscharacteristics.ThispaperwillmainlyintroduceCarrousel’sstructure,
4、themechanismoftheoxidationditch,theexistencequestionanditslatestdevelopment.2.ThestructureofCarrouseloxidationditchCarrouseloxidationditchisDHVCompanydevelopedin1967bytheDutch.OnthebasisoftheoriginalCarrouseloxidationditchDHVEIMCOit’spatentedintheUnitedStatesCompanyandcreatedtheCarr
5、ousel2000System,realizesthehigherrequirementsofbiologicaldenitrificationandphosphorusremovalfunction.Byfartheworldhasmorethan850CarrouseloxidationditchandCarrousel2000Systemisrunning.Carrouseloxidationditchwithdirectionalcontrolofaerationandagitationdevice,themixturetransferhorizont
6、alvelocity,whichwasstirringthemixtureofcirculatingintheoxidationditchchannelsclosed.Oxidationditchhasspecialhydraulicflowstate,therefore,hasthecharacteristicsofboththecompletelymixedreactorandhasthecharacteristicofpushflowreactor,grooveexistsobviousdissolvedoxygenconcentrationgradie
7、nt.Oxidationditchcrosssectionisrectangularortrapezoidal,planeshapeisoval,moregroovedepthisgenerally2.5~4.5m,widthdepthratiois2:1,alsohaveadepthofupto7m,ditchwateranaveragespeedof0.3m/s.Oxidationditchaerationmixingequipmenthavesurfaceaerator,aerationbrushorturntable,jetaerator,cathet
8、ertypeaeratorandris
